I found what I believe to be a second mint mark on the back of this penny. *Look above the building* Anyone seen anything like this before? Coin value? This penny is in better shape than the picture shows:
Sorry, I see nothing that looks like a mint mark. It would be virtually impossible for a mint mark to end up on the reverse. What I do see appears to be zinc rot, is that a post-1982 Zincoln?
There is an "S" stamped above the building on the right (to the right of the word Unum). You can't really see the tail of the "S" in the photo but I assure you it's there.
That's impossible unless it's a dropped letter. Dropped letters will be incused not raised. You coin is corroded, that's all. If what you are talking about is below the "s" in "pluribus", it may be a die chip.
My guess would be a die chip and definitely corroded. I have a steel cent with what looks like a "D" on the reverse field. Turns out, it's a die chip. I'll post a picture.
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